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Add interfaces for controlling the host power to optimize the power consumption in MediaTek UFS platforms. Link: https://lore.kernel.org/r/20220623035052.18802-7-stanley.chu@mediatek.com Reviewed-by: Stanley Chu <stanley.chu@mediatek.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Po-Wen Kao <powen.kao@mediatek.com> Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>